Browser Not Closed After Google Auth

After successfully retrieving Credentials using the WebAuthProvider for Google login I find that the browser window is not closed. Is there a way to close it? This does not happen with Facebook login, where the browser window is closed.

Can you update your question with the exact configuration and library versions you're using? To my knowledge, although the browser will launch again the original app after the authentication completes due to the configured intent handler it's not possible to close the browser application itself.